CN201436472U - Fire discharging piece, combustor adopting fire discharging piece and gas water heater - Google Patents
Fire discharging piece, combustor adopting fire discharging piece and gas water heater Download PDFInfo
- Publication number
- CN201436472U CN201436472U CN2009200259970U CN200920025997U CN201436472U CN 201436472 U CN201436472 U CN 201436472U CN 2009200259970 U CN2009200259970 U CN 2009200259970U CN 200920025997 U CN200920025997 U CN 200920025997U CN 201436472 U CN201436472 U CN 201436472U
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- Prior art keywords
- fiery
- light
- screening
- flame
- dense
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- 238000007599 discharging Methods 0.000 title description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 4
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000012216 screening Methods 0.000 claims description 87
- 239000000567 combustion gas Substances 0.000 claims description 49
- 238000002485 combustion reaction Methods 0.000 abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 239000002737 fuel gas Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Abstract
The utility model discloses a fire row's piece and adopt combustor and gas heater of this fire row's piece can solve domestic gas heater cost higher and discharge the serious problem of environmental pollution of NOx's content on the high side in the flue gas. The flame exhaust sheet comprises a light flame plate, a flame exhaust sheet body and side baffles, each flame exhaust sheet is provided with an independent thick flame flow channel and a light flame flow channel, the light flame plate is provided with a plurality of light flame holes, and the two sides of the light flame plate are provided with the thick flame holes. The utility model realizes the separation of thick and thin flames through the reasonable arrangement of thick and thin flames and the special structure of the fire discharge piece, reduces the combustion temperature when the gas is combusted, and effectively inhibits the generation of NOx when the gas is combusted; meanwhile, the height of the combustion flame is much lower than that of the common combustion, so that the height of the shell of the heat exchanger can be effectively reduced, and the material cost is reduced.
Description
Technical field
The utility model belongs to technical field of water heaters, specifically, relates to a kind of fiery screening and adopts the burner and the gas heater of this fire screening.
Background technology
Along with the continuous progress of society, people's living standard improves constantly, and society is more and more stronger to the protection consciousness of environment; The content of NOx is higher in the flue gas of domestic gas-fired water heater discharging at present, and is very serious to the pollution of environment.
Experimental analysis shows to the gas heater fuel gas buring, and the formation speed of NOx is subjected to the influence of ignition temperature very big in the flue gas; The NOx of the high more generation of ignition temperature is many more, so, the common product of always NOx being regarded as high-temp combustion; So reduce the content of NOx in the combustion product gases, will reduce ignition temperature.In family expenses gas heater industry, everybody generally adopts a kind of bias combustion mode to reduce the content of NOx in the gas heater discharging combustion gas; The mixed proportion of combustion gas and primary air when so-called bias combustion just is meant burning, (α 1 is little for its primary air ratio for the burner that the combustion gas volume fraction is big, also cry dense burning) combine compound combustion of formation with the little burner (its α 1 is big, also cries light burning) of combustion gas volume fraction; Delay fuel gas buring by this burning, reduce ignition temperature, thereby reduce the generation of NOx.
Shown in Figure 1 is the schematic diagram of bias combustion: being combined into deep or light compound combustion by dense burning and light burning, is that dense burning and light burning are simply combined, this kind combination be dense burning in the centre, both sides are light burnings; The required air of wherein light burning is to be supplied with by primary air and auxiliary air, and dense burning required air is to be supplied with by primary air and light burning surplus air; Because the original primary air of dense burning is just not enough, remaining fuel gas buring all relies on the remaining air of light burning, causes the combustion flame height easily like this, thereby causes the housing of heat exchanger will satisfy certain altitude, increases material cost; This burning simultaneously is little to the content effect that reduces flue gas NOx.
Summary of the invention
The utility model provides a kind of fiery screening and has adopted the burner and the gas heater of this fire screening, can solve the serious problem of the higher environmental pollution of content of NOx in the higher and discharging flue gas of domestic gas-fired water heater cost that prior art exists.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of fiery screening comprises light flame board, fiery screening body and side guard, and described light flame board is provided with some light glory holes, and the both sides of described light flame board are dense glory holes.
In the technical solution of the utility model, also have following technical characterictic: the side of described fiery screening body is provided with dense combustion gas inlet and light combustion gas inlet, dense combustion gas inlet is positioned near the fiery screening middle part, and light combustion gas inlet is positioned at fiery screening bottom.
In the technical solution of the utility model, also have following technical characterictic: described light flame board is located at the upper end of fiery screening body, described side guard is inserted into the top of described light flame board and fiery screening body assembly, leave the gap between described side guard and the fiery screening body, this gap promptly constitutes the dense glory hole of light flame board both sides.
In the technical solution of the utility model, also have following technical characterictic: described fiery screening also is provided with independent dense flame runner and light flame runner, dense flame runner in the described fiery screening is that dense combustion gas enters the mouth to the gap of leaving between side guard and the fiery screening body, and described light flame runner is by the light glory hole of light combustion gas inlet to the light flame board.
A kind of shade burner, the fire row of described burner is assembled by some fiery screenings, each fiery screening comprises light flame board, fire screening body and side guard, each fiery screening is provided with independent dense flame runner and light flame runner, described light flame board is provided with some light glory holes, and the both sides of the described light flame board of each fiery screening are dense glory holes.
In the technical solution of the utility model, also have following technical characterictic: the side of described fiery screening body is provided with dense combustion gas inlet and light combustion gas inlet, dense combustion gas inlet is positioned near the fiery screening middle part, and light combustion gas inlet is positioned at fiery screening bottom.
In the technical solution of the utility model, also have following technical characterictic: described light flame board is located at the upper end of fiery screening body, described side guard is inserted into the top of described light flame board and fiery screening body assembly, leaves the gap between described side guard and the fiery screening body.
In the technical solution of the utility model, also have following technical characterictic: the dense flame runner in the described fiery screening is entered the mouth to the gap of leaving between side guard and the fiery screening body by dense combustion gas, and described light flame runner is by the light glory hole of light combustion gas inlet to the light flame board.
In the technical solution of the utility model, also have following technical characterictic: leave the gap between the adjacent fiery screening, this gap is as the entrance and exit of burner auxiliary air.
A kind of gas heater adopts above-mentioned shade burner.
Above-mentioned shade burner is assembled by deep or light fiery screening independently, each fiery screening has independent dense flame and light flame runner, combustion gas is entered by different inlets, while injection part primary air, through separately independently runner mix after the glory hole ejection is burnt above burner then.The combustion gas that wherein light burning consumes accounts for more than 70% of whole fire row combustion gas amount; Because its primary air ratio of light burning α 1 is bigger, is tending towards full premix combustion (primary air satisfies the fuel gas buring required air quantity fully) substantially, so light combustion flame is lower.Dense combustion flame is in the both sides of light combustion flame, and the lighter burning of gas quantity that the gas quantity of dense burning accounts for whole fire row is few, and simultaneously required primary air ratio is also low, and its air inlet is smaller; Dense combustion flame is higher than light burning, and the required air part of burning is from primary air, the air that auxiliary air that another part provides from burner and light burning have not utilized; These air and dense combustion gas fully burn above burner.Auxiliary air in the required combustion air of dense burning is to supply with from the gap between two fiery screenings, and how much for auxiliary air is to be as the criterion with the abundant burning that guarantees dense burning.
Like this, the required air of dense burning also has the intact air of light burning to participate in burning except primary air and auxiliary air; Twice combustion is just experienced in the combustion gas that participates in dense burning like this, and once light burning once with the mixed combustion of dense burning, thereby reduces the fuel gas buring temperature, reduces the generation of NOx in the combustion product gases.
Compared with prior art, advantage of the present utility model and good effect are:
The utility model is realized the special construction that deep or light flame separates by rational deep or light flame collocation with the special construction of fiery screening, dense glory hole is positioned at the both sides of light glory hole, ignition temperature when reducing fuel gas buring, the generation of NOx when having suppressed fuel gas buring has effectively reduced the content of NOx in the combustion gas; Combustion flame aspect ratio ordinary combustion is low much simultaneously, can effectively reduce the housing height of heat exchanger, reduces material cost.
Description of drawings
Fig. 1 is the flame schematic diagram of traditional bias combustion, and wherein, height Gao Zhe represents dense burning, and highly low person represents light burning;
Fig. 2 is fiery screening structure exploded perspective view;
Fig. 3 is the structural representation of fiery screening;
Fig. 4 is the dense flame runner structural representation in the fiery screening; Arrow is represented combustion gas and air flow;
Fig. 5 is the light flame runner structural representation in the fiery screening; Arrow is represented combustion gas and air flow;
Fig. 6 is the structural assembly structural representation of shade burner;
Wherein: I, shade burner; 1, fire row; 2, header board; 3, back plate; 10, fiery screening; 11, light flame board; 12, fiery screening body; 13, side guard; 14, light glory hole; 15, dense combustion gas inlet; 16, light combustion gas inlet; 17, gap between side guard and the fiery screening body; 18, gap between the fiery screening.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
As shown in Figures 2 and 3, fiery screening 10 comprises light flame board 11, fiery screening body 12 and side guard 13, and light flame board 11 is provided with some light glory holes 14.The side of described fiery screening body 12 is provided with dense combustion gas inlet 15 and light combustion gas inlet 16, and dense combustion gas inlet 15 is positioned at fiery screening 10 middle parts, and light combustion gas inlet 16 is positioned at fiery screening 10 bottoms.
Described light flame board 11 is located at the upper end of fiery screening body 12, described side guard 13 is inserted into the top of described light flame board 11 and fiery screening body 12 assemblys, leave gap 17 between described side guard 13 and the fiery screening body 12, this gap 17 is promptly as dense glory hole.
Each fiery screening 10 is provided with independent dense flame runner and light flame runner, dense flame runner in the fiery screening 10 as shown in Figure 4, the dense flame runner in the described fiery screening 10 enters the mouth 15 to the gap of leaving between side guard 13 and the fiery screening body 12 17 by dense combustion gas; Light flame runner in the fiery screening 10 shown in Figure 5, described light flame runner is by the light glory hole 14 of light combustion gas inlet 16 to the light flame board 11.
Shown in Figure 6, I represents whole shade burner, comprises fire row 1, plate 3 behind burner header board 2 and the burner, described fire row 1 is assembled by some fiery screenings 10, leaves gap 18 between the adjacent fiery screening 10, and gap 18 is as the circulation passage of the auxiliary air of burner.
The light burning of the shade burner of said structure is: combustion gas and primary air enter burner from bigger light flame fuel gas inlet, below, gap between the fiery screening simultaneously enters auxiliary air, last mixed combustion gas and air burn above burner by light glory hole ejection.
Dense burning is: combustion gas and primary air enter burner from less dense flame fuel gas inlet, the air that light burning has not simultaneously utilized is sneaked into dense flame runner, spray from dense glory hole (being the gap between side guard and the fiery screening body) then, these air allow dense combustion gas fully burn above burner, and dense combustion flame is in the both sides of light combustion flame.Like this, the required air of dense burning also has the intact air of light burning to participate in burning except primary air and auxiliary air; Twice combustion is just experienced in the combustion gas that participates in dense burning like this, and once light burning once with the mixed combustion of dense burning, thereby reduces the fuel gas buring temperature, reduces the generation of NOx in the combustion product gases.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (10)
1. a fiery screening comprises light flame board, and fiery screening body and side guard is characterized in that: described light flame board is provided with some light glory holes, and the both sides of described light flame board are dense glory holes.
2. fiery screening according to claim 1, it is characterized in that: the side of described fiery screening body is provided with dense combustion gas inlet and light combustion gas inlet, dense combustion gas inlet is positioned near the fiery screening middle part, and light combustion gas inlet is positioned at fiery screening bottom.
3. fiery screening according to claim 1, it is characterized in that: described light flame board is located at the upper end of fiery screening body, described side guard is inserted into the top of described light flame board and fiery screening body assembly, leaves the gap between described side guard and the fiery screening body.
4. fiery screening according to claim 3, it is characterized in that: also comprise dense flame runner and light flame runner, the dense flame runner of described fiery screening is that dense combustion gas enters the mouth to the gap of leaving between side guard and the fiery screening body, and described light flame runner is by the light glory hole of light combustion gas inlet to the light flame board.
5. shade burner, it is characterized in that: the fire row of described burner is assembled by some fiery screenings, each fiery screening comprises light flame board, fire screening body and side guard, each fiery screening is provided with independent dense flame runner and light flame runner, described light flame board is provided with some light glory holes, and the both sides of the described light flame board of each fiery screening are dense glory holes.
6. shade burner according to claim 5, it is characterized in that: the side of described fiery screening body is provided with dense combustion gas inlet and light combustion gas inlet, dense combustion gas inlet is positioned near the fiery screening middle part, and light combustion gas inlet is positioned at fiery screening bottom.
7. shade burner according to claim 5, it is characterized in that: described light flame board is located at the upper end of fiery screening body, described side guard is inserted into the top of described light flame board and fiery screening body assembly, leaves the gap between described side guard and the fiery screening body.
8. shade burner according to claim 7, it is characterized in that: the dense flame runner of described fiery screening is that dense combustion gas enters the mouth to the gap of leaving between side guard and the fiery screening body, and described light flame runner is by the light glory hole of light combustion gas inlet to the light flame board.
9. according to the described shade burner of arbitrary claim among the claim 5-8, it is characterized in that: leave the gap between the adjacent fiery screening.
10. a gas heater is characterized in that adopting the described shade burner of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200259970U CN201436472U (en) | 2009-05-25 | 2009-05-25 | Fire discharging piece, combustor adopting fire discharging piece and gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200259970U CN201436472U (en) | 2009-05-25 | 2009-05-25 | Fire discharging piece, combustor adopting fire discharging piece and gas water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201436472U true CN201436472U (en) | 2010-04-07 |
Family
ID=42372926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200259970U Expired - Lifetime CN201436472U (en) | 2009-05-25 | 2009-05-25 | Fire discharging piece, combustor adopting fire discharging piece and gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201436472U (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032593A (en) * | 2010-11-11 | 2011-04-27 | 上海安可科技有限公司 | Combustion ignition device and combustion ignition method thereof |
| CN102221205A (en) * | 2010-04-13 | 2011-10-19 | 樱花卫厨（中国）股份有限公司 | Combustor for gas water heater |
| CN102809155A (en) * | 2011-05-30 | 2012-12-05 | 株式会社能率 | Rich-lean combustion burner |
| CN102954590A (en) * | 2011-08-18 | 2013-03-06 | 樱花卫厨（中国）股份有限公司 | Improved structure of combustor for gas water heater |
| CN103185339A (en) * | 2011-12-28 | 2013-07-03 | 株式会社能率 | Rich-lean combustion burner and combustion apparatus |
| CN103477151A (en) * | 2010-12-01 | 2013-12-25 | A.O.史密斯公司 | Low NOx burner for a water heater |
| CN104807010A (en) * | 2015-04-30 | 2015-07-29 | 上海禾森机电有限公司 | Low-NOx burner for wall-hung stove |
| CN105003915A (en) * | 2015-07-09 | 2015-10-28 | 宁波方太厨具有限公司 | Burner for gas water heater |
| CN105765303A (en) * | 2013-11-15 | 2016-07-13 | 庆东纳碧安株式会社 | Rich-lean combustion apparatus |
| CN106016267A (en) * | 2016-07-07 | 2016-10-12 | 江苏叶茂厨卫科技有限公司 | Environment-friendly dense and sparse burner |
| CN106642106A (en) * | 2016-11-18 | 2017-05-10 | 宁波方太厨具有限公司 | Thick light burner |
| CN106801868A (en) * | 2016-12-27 | 2017-06-06 | 威能(无锡)供热设备有限公司 | Burner unit and the gas and hot water equipment using the burner unit |
| CN107110497A (en) * | 2014-11-25 | 2017-08-29 | 庆东纳碧安株式会社 | Overrich lean burn device |
| CN107228365A (en) * | 2017-07-31 | 2017-10-03 | 上海金巨源热能技术有限公司 | A kind of metal burner of deep or light two chamber |
| WO2018094752A1 (en) * | 2016-11-25 | 2018-05-31 | 芜湖美的厨卫电器制造有限公司 | Burner and gas water heater provided with same |
| CN108361699A (en) * | 2018-04-03 | 2018-08-03 | 苏州来美精密机械有限公司 | A kind of shade type gas burner and its installation method |
| CN109489240A (en) * | 2018-11-23 | 2019-03-19 | 艾欧史密斯(中国)热水器有限公司 | Gas-fired water heater |
| CN109595557A (en) * | 2018-09-26 | 2019-04-09 | 中山市恒乐电器有限公司 | A kind of low-NOx combustor for water heater |
| CN109695876A (en) * | 2019-01-02 | 2019-04-30 | 刘维 | A kind of Ran's combustion fire row combustor |
| CN109751598A (en) * | 2019-03-14 | 2019-05-14 | 上海金巨源热能技术有限公司 | A kind of burner with four light two dense linear array fire hole cores |
| CN111550790A (en) * | 2020-06-05 | 2020-08-18 | 珠海格力电器股份有限公司 | Combustor and gas heater |
| CN112747315A (en) * | 2021-01-06 | 2021-05-04 | 宁波方太厨具有限公司 | Water-cooling thick and thin heat exchanger burner group and gas furnace |
| CN113654041A (en) * | 2021-07-22 | 2021-11-16 | 何俊荣 | Up-draft thick-thin burner |
-
2009
- 2009-05-25 CN CN2009200259970U patent/CN201436472U/en not_active Expired - Lifetime
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221205A (en) * | 2010-04-13 | 2011-10-19 | 樱花卫厨（中国）股份有限公司 | Combustor for gas water heater |
| CN102032593A (en) * | 2010-11-11 | 2011-04-27 | 上海安可科技有限公司 | Combustion ignition device and combustion ignition method thereof |
| CN103477151B (en) * | 2010-12-01 | 2015-09-09 | A.O.史密斯公司 | For the low NO of water heater xburner |
| CN103477151A (en) * | 2010-12-01 | 2013-12-25 | A.O.史密斯公司 | Low NOx burner for a water heater |
| CN102809155A (en) * | 2011-05-30 | 2012-12-05 | 株式会社能率 | Rich-lean combustion burner |
| CN102954590A (en) * | 2011-08-18 | 2013-03-06 | 樱花卫厨（中国）股份有限公司 | Improved structure of combustor for gas water heater |
| CN103185339B (en) * | 2011-12-28 | 2016-08-03 | 株式会社能率 | Rich-lean combustion burner and burner |
| CN103185339A (en) * | 2011-12-28 | 2013-07-03 | 株式会社能率 | Rich-lean combustion burner and combustion apparatus |
| CN105765303B (en) * | 2013-11-15 | 2018-07-03 | 庆东纳碧安株式会社 | Overrich lean burn device |
| CN105765303A (en) * | 2013-11-15 | 2016-07-13 | 庆东纳碧安株式会社 | Rich-lean combustion apparatus |
| US9803856B2 (en) | 2013-11-15 | 2017-10-31 | Kyungdong Navien Co., Ltd. | Rich-lean combustion apparatus |
| CN107110497B (en) * | 2014-11-25 | 2019-06-04 | 庆东纳碧安株式会社 | Overrich lean burn device |
| CN107110497A (en) * | 2014-11-25 | 2017-08-29 | 庆东纳碧安株式会社 | Overrich lean burn device |
| CN104807010A (en) * | 2015-04-30 | 2015-07-29 | 上海禾森机电有限公司 | Low-NOx burner for wall-hung stove |
| CN105003915A (en) * | 2015-07-09 | 2015-10-28 | 宁波方太厨具有限公司 | Burner for gas water heater |
| CN105003915B (en) * | 2015-07-09 | 2017-08-29 | 宁波方太厨具有限公司 | A kind of burner for gas heater |
| CN106016267A (en) * | 2016-07-07 | 2016-10-12 | 江苏叶茂厨卫科技有限公司 | Environment-friendly dense and sparse burner |
| CN106642106A (en) * | 2016-11-18 | 2017-05-10 | 宁波方太厨具有限公司 | Thick light burner |
| WO2018094752A1 (en) * | 2016-11-25 | 2018-05-31 | 芜湖美的厨卫电器制造有限公司 | Burner and gas water heater provided with same |
| CN106801868B (en) * | 2016-12-27 | 2019-04-12 | 威能(无锡)供热设备有限公司 | Burner unit and the gas and hot water equipment for using the burner unit |
| CN106801868A (en) * | 2016-12-27 | 2017-06-06 | 威能(无锡)供热设备有限公司 | Burner unit and the gas and hot water equipment using the burner unit |
| CN107228365A (en) * | 2017-07-31 | 2017-10-03 | 上海金巨源热能技术有限公司 | A kind of metal burner of deep or light two chamber |
| CN108361699A (en) * | 2018-04-03 | 2018-08-03 | 苏州来美精密机械有限公司 | A kind of shade type gas burner and its installation method |
| CN108361699B (en) * | 2018-04-03 | 2024-04-19 | 来美能源科技无锡有限公司 | Thick and thin type gas burner and installation method thereof |
| CN109595557A (en) * | 2018-09-26 | 2019-04-09 | 中山市恒乐电器有限公司 | A kind of low-NOx combustor for water heater |
| CN109489240A (en) * | 2018-11-23 | 2019-03-19 | 艾欧史密斯(中国)热水器有限公司 | Gas-fired water heater |
| CN109489240B (en) * | 2018-11-23 | 2024-03-12 | 艾欧史密斯(中国)热水器有限公司 | Gas water heater |
| CN109695876A (en) * | 2019-01-02 | 2019-04-30 | 刘维 | A kind of Ran's combustion fire row combustor |
| CN109751598A (en) * | 2019-03-14 | 2019-05-14 | 上海金巨源热能技术有限公司 | A kind of burner with four light two dense linear array fire hole cores |
| CN111550790A (en) * | 2020-06-05 | 2020-08-18 | 珠海格力电器股份有限公司 | Combustor and gas heater |
| CN112747315A (en) * | 2021-01-06 | 2021-05-04 | 宁波方太厨具有限公司 | Water-cooling thick and thin heat exchanger burner group and gas furnace |
| CN112747315B (en) * | 2021-01-06 | 2021-12-24 | 宁波方太厨具有限公司 | Water-cooling thick and thin heat exchanger burner group and gas furnace |
| CN113654041A (en) * | 2021-07-22 | 2021-11-16 | 何俊荣 | Up-draft thick-thin burner |
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